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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WLAN High Availability and Security Design | 20% | - High availability design
- Security architecture design
|
| Topic 2: Wireless Site Survey | 25% | - Design requirements collection and constraint evaluation
- Layer 1 site survey execution and analysis - Pre-deployment survey and validation |
| Topic 3: Wireless Infrastructure Design | 30% | - Wireless Controller architecture and deployment
|
| Topic 4: Mobility Design | 25% | - Mobility architecture models
|
PassTestのCiscoの300-110試験トレーニング資料は正確性が高くて、カバー率が広くて、値段も安いです。君がうちの学習教材を購入した後、私たちは一年間で無料更新サービスを提供することができます。もしCiscoの300-110問題集は問題があれば、或いは試験に不合格になる場合は、全額返金することを保証いたします。
質問 # 80
A customer has a Cisco wireless network with two Cisco Catalyst 9800 Series WLCs in a high availability cluster, 50 Cisco 2800I APs, and all SSIDs and services are 5 GHz only. A security mandate requires that rogue APs be scanned and identified in 2.4 GHz and 5 GHz bands without impacting existing client connectivity. How must the wireless network be reconfigured to meet the requirement without purchasing additional APs?
正解：B
解説：
The Cisco Aironet 2800 Series APs feature a dual-radio architecture with a dedicated 5 GHz radio (slot 1) and a Flexible Radio Assignment (XOR) radio (slot 0) that can operate in either 2.4 GHz or 5 GHz, or be assigned to monitor mode for scanning functions. Since all existing SSIDs and services are 5 GHz only, the slot 1 (dedicated 5 GHz) radio is responsible for all current client connectivity - it must remain in Client Serving mode to maintain uninterrupted 5 GHz WLAN service. The XOR radio (slot 0), currently either idle or operating as a secondary 5 GHz radio, can be repurposed without impacting client service. Setting the XOR radio to Monitor mode enables it to continuously scan all channels across both the 2.4 GHz and 5 GHz spectrum for rogue AP detection, using the embedded CleanAir and WIDS capabilities. In Monitor mode, the XOR radio operates full-time as a dedicated scanner, providing rogue detection coverage on 2.4 GHz (previously uncovered since all services were 5 GHz) and supplementary scanning on 5 GHz. This eliminates the need for additional dedicated monitor mode APs. Options A, C, and D either place the slot 1 radio in a non-client-serving role (disrupting existing connectivity) or use the inappropriate Sniffer mode instead of Monitor mode for rogue detection. Reference: WLSD Study Guide - Cisco 2800 XOR Radio Architecture, Monitor Mode for Rogue Detection, Flexible Radio Assignment, WIDS Design.
質問 # 81
An engineer is designing a high-density WLAN and wants to reduce the airtime consumed by each client transmission. Which configuration should be included in the RF profile?
正解：D
解説：
A frame transmitted at a low data rate occupies the channel far longer than the same frame sent at a high rate, and because the medium is shared, a single distant client transmitting at 1 Mbps consumes airtime that every other client on that channel must wait through. Disabling the low rates and raising the mandatory minimum forces clients to either connect at an efficient rate or roam to a closer AP, which shrinks the effective cell size, reduces co-channel interference, and increases aggregate capacity - all of which are desirable in a dense design where APs are closely spaced. Management and broadcast frames are also sent at the lowest mandatory rate, so raising that floor reduces beacon and broadcast overhead as well. Leaving all rates enabled or setting 1 Mbps as mandatory produces oversized cells with heavy airtime consumption, and restricting the 2.4 GHz radio to 802.11b rates would be the worst possible outcome for efficiency.
質問 # 82
A community bank has three campus locations and one HQ with the data center. Each campus has four Cisco Catalyst 9120 APs. Poor WAN uplinks cause impacted connectivity back to HQ, and each campus is planned to have its own EWC controller based on C9120 AP to keep traffic local. Guest WLAN will be routed locally. Employee WLAN must be authenticated 802.1x PEAP via HQ ISE but can pass traffic locally once authenticated. HQ WLC will be the primary backup WLC for each WLC. Which design approach should the consulting engineer take?
正解：C
解説：
This community bank design scenario requires precise alignment of EWC deployment scale, AAA integration, and traffic routing decisions with the stated constraints. With four APs per campus and a goal of local traffic handling, converting a single C9120 to EWC mode is optimal -- converting two APs to EWC (Options B and C) on a four-AP campus wastes 50% of campus AP infrastructure for controller functions rather than client service. The single EWC AP serves as the active local controller for the remaining three client-serving APs. The HQ WLC set as N+1 backup ensures that if the branch EWC fails, the remaining APs fall back to the centralized controller. For the guest WLAN, local web authentication on the guest VLAN provides the locally routed guest access requirement without requiring WAN connectivity to HQ. For the employee WLAN, adding the HQ ISE AAA server to the EWC's RADIUS configuration enables 802.1x PEAP authentication to traverse the WAN to ISE at the time of client association. Once authenticated, traffic is locally switched -- satisfying both the central authentication and local traffic routing requirements simultaneously. Option D's use of guest anchor for the employee WLAN is architecturally incorrect and would route traffic through HQ rather than locally.
質問 # 83
A customer has an existing wireless network with a Cisco 9800 WLC high availability cluster and Cisco 9120 APs. The customer asks an engineer to perform a post wireless survey that includes a list of any non-802.11 devices on the 5 GHz band. The engineer performs the survey using an
802.11a/b/g/n/ac/ax WLAN adapter but did not use a spectrum analyzer. Which approach meets the requirements?
正解：C
解説：
Non-802.11 device detection on the 5 GHz band without a dedicated spectrum analyzer is possible through Cisco's CleanAir technology, which is embedded as an RF ASIC in many Cisco AP models including the 9120 series. CleanAir operates at the hardware layer -- below the
802.11 MAC -- enabling the APs to detect, classify, and report non-802.11 interference sources such as cordless phones, microwave ovens, video cameras, radar, and other unlicensed RF emitters in the 5 GHz spectrum. The WLC aggregates CleanAir reports from all APs and provides a consolidated interference device list accessible through the WLC's monitoring interface. Since the question specifies the 5 GHz band, the relevant 802.11 protocol for 5 GHz is 802.11a (and its successors 802.11n and 802.11ac). Exporting the list of 802.11a interferers from the WLC using the CleanAir RF ASIC correctly targets the 5 GHz band and identifies non-802.11 devices detected there.
質問 # 84
An engineer must reduce roaming delay for wireless medical carts running a real-time application on an 802.1X-secured WLAN. Which feature should be included in the design to eliminate the full reauthentication on each roam?
正解：D
解説：
On an 802.1X/WPA2-Enterprise WLAN, a standard roam requires the client to complete a full EAP exchange with the authentication server plus a four-way handshake, which typically takes hundreds of milliseconds and is enough to break a real-time session. 802.11r Fast Transition solves this by caching the master key material and pre-establishing the key hierarchy so the client can complete the roam with an abbreviated exchange, reducing roam time to well under 50 ms.
This is the only option in the list that eliminates the reauthentication itself. 802.11k assists roaming by providing the client a neighbor report so it does not have to scan every channel to find candidate APs, and 802.11v allows the infrastructure to steer a client toward a better AP - both reduce the time spent deciding where to roam, but neither shortens the authentication exchange once the target AP is chosen. Aironet IE carries Cisco-specific information elements and is unrelated to fast roaming key handling.
質問 # 85
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